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When your motion system demands a quiet, corrosion-resistant pinion gear that fits a wide range of shaft diameters without custom machining, sourcing the right plastic spur gear becomes a real challenge. Hobbyists building 3D printers, robotics engineers prototyping drive trains, and makers designing compact automation rigs all need a reliable 1 mod gear that installs cleanly and runs smoothly — this 1 Mod 48-tooth blue nylon spur gear with stepped bore is engineered for exactly that use case.
Each gear is machined from engineering-grade nylon (PA66), delivering a balance of mechanical strength, low friction, and electrical insulation. The stepped bore design accommodates shaft diameters from 6 mm (0.24 in) to 25 mm (0.98 in), with a finished outer diameter of approximately 50 mm (1.97 in) and a face width typically in the 10–15 mm (0.39–0.59 in) range. The distinctive blue color aids visual identification in multi-gear assemblies.
Typical applications include 1 mod gear rack and pinion systems for CNC router axes, lightweight spur gear drives in desktop robotic arms, and low-noise transmission stages in 3D printer extruder or Z-axis assemblies where metal gears would introduce unwanted vibration or electrical conductivity risks.
Machined from PA66 nylon for a strong strength-to-weight ratio, inherent lubricity, and resistance to oils and mild chemicals — no additional lubrication required for most light-duty applications.
Standard 1M tooth geometry ensures accurate meshing with any Module 1 rack or mating gear. 48 teeth deliver a smooth, fine-pitch transmission suitable for low-to-medium torque drives.
The stepped bore accommodates shafts from 6 mm to 25 mm (0.24–0.98 in), eliminating the need for custom boring. Select your exact bore diameter from the variant options above.
Nylon's natural damping properties reduce gear noise and absorb minor misalignment shock — ideal for desktop machines, robotics, and any application where quiet operation matters.
PA66 nylon is an electrical insulator, making these gears safe for use in electronics-adjacent assemblies, servo-driven systems, and environments where metal gears could create short-circuit risks.
Unlike steel or cast-iron gears, nylon does not rust or oxidize. These gears maintain dimensional stability in humid workshop environments and light outdoor enclosures without any surface treatment.
| Module | 1M (Module 1) |
|---|---|
| Number of Teeth | 48T |
| Pitch Diameter | 48 mm (1.89 in) |
| Outer Diameter (approx.) | ~50 mm (~1.97 in) |
| Face Width | See variant options |
| Bore Diameter | 6 / 8 / 10 / 12 / 14 / 15 / 16 / 17 / 18 / 19 / 20 / 22 / 24 / 25 mm |
| Bore Type | Stepped bore (no keyway) |
| Material | PA66 Nylon |
| Color | Blue |
| Pressure Angle | 20° |
| Tooth Profile | Involute spur |
| Weight (per piece) | See variant options |
| Packing | 1 PCS per unit |
Measure your shaft's outer diameter with a caliper. Select the bore option that matches exactly — for example, if your shaft is 10 mm, choose the 10 mm bore variant. The stepped bore is precision-machined to a close tolerance fit. If your shaft diameter falls between listed sizes, contact us to confirm the best option.
PA66 nylon gears are suited for light-to-medium torque applications. At Module 1 with 48 teeth, these gears are typically used in drives up to approximately 1–3 Nm depending on speed and operating temperature. For high-torque or continuous-duty industrial applications, a metal gear would be more appropriate.
Yes. This gear follows the standard Module 1 involute tooth profile with a 20° pressure angle, so it meshes correctly with any 1M metal or plastic rack, pinion, or mating spur gear. Running a nylon gear against a metal counterpart is a common pairing that reduces wear on the softer nylon gear while protecting the metal component.
PA66 nylon does absorb a small amount of ambient moisture, which can cause minor dimensional changes (typically <0.5% linear). For most workshop and indoor robotics applications this is negligible. If your application requires tight dimensional stability in high-humidity environments, store gears in a sealed bag until installation and allow them to equilibrate before use.
Nylon has inherent self-lubricating properties, so many light-duty applications run dry without issue. For higher speeds or loads, a light application of PTFE-based or silicone grease (avoid petroleum-based greases that can degrade nylon) will extend service life and reduce operating temperature.
Nylon spur gears are lighter, quieter, corrosion-resistant, and electrically non-conductive compared to steel or aluminum equivalents. The trade-off is lower load capacity and reduced heat resistance (nylon softens above ~120°C / 248°F). Choose nylon for low-noise, lightweight, or electrically sensitive applications; choose metal for high-torque or high-temperature environments.
Yes — 1 Mod 48-tooth nylon spur gears are widely used in 3D printer extruder drives, Z-axis lead screw couplings, and CNC router rack-and-pinion axis systems. The low noise and self-lubricating properties make them a practical choice for desktop fabrication equipment running at moderate speeds.
